Hand press



Patented Mar. 29, 19237.

UNITED STATES l.622,8t}5 PATENT OFFICBQ WILLIAM PAPKE, OF CINCINNATI,OHIQ.

HAND

Application filed May 18,

This invention relates to hand-presses used for making various forms ofprinters rules from sheet-metal strips or blanks, and, moreparticularly, to that type of presses employing a work plate or table onwhich are in terchangeably mounted the female tormerdies and a plungeror ram, the latter carryiug interchangeahlc male dies to correspond tosaid female dies and in longitudinal alinement, for receiving, in thework-gap between them. the sheet-metal strips or blanks that are to bebent into the desired printing shapes or configurations by means of atoggle-jointed hand-lever, which latter pivotally-mounted on the saidtable or the basemcmber ot the press convenient to the operator.

The main object of the invention herein is to provide a base-member, awork-table carried by the baseancmber, a stationary anvil or former dieon the work-table, a longitudinal]y-adjustable block on said basememberarranged. to the rear or" the said work-table, a male-die carryingplunger or ram mounted to move in .guideways on the said work-table andhaving toggle-lever pivotal-connection with the said adjustable block,and the latter being set and held on the base-men'iber, to suit thestroke necessary for the forward movement or" the plunger and therespective male former-dies that are carried at its fore end, by meansof a longitudinal compensating-screw that has a hand manipulating wheelat its rear outer end for readily determining the position of the saidadjustable block and the point of impingement and delivery contact ofthe male former-die with the adjacent face of the metal strip or blankto be bent or shaped into the desired printers rule :lorm against saidanvil or female :l'ormer-die.

The details ct structure, especially in connection with the special ringor circle-rule forming-nest o1" anvil-dies, will be fully describedhereinatter in connection with the accompanying sheet of drawings, inwhich- Figure 1 is a plan view of the press, but omitting its dies; Fig.2, a side elevation of the same, showing the hand-lever depressed orturned down at the close of an active forward stroke of the male-dieplunger; Fig. 3. a plan view of the base-member with the upperwork-table removed. from its supporting transverse blocks that haveopenings or holes therein for the slidable-engagement oi the pair oflongitudinal rods that project PRESS.

1922. Serial No. 5555,0553.

forwardly from the fore end of the accompanying adjustable block(omitting the hand-lrever and its hearings) on the said base-member thatvariably positions the toggle-joint connection of the hand-lever withthe male-die plunger for various strokes of the latter to suit thevariations in the employment of the several dies used especially inmaking a full-circle rule; Fig. 4, a frag mentary plan of the work-tableshowing dies therein for shaping said circular rule or rings; Fig. 5, aside elevation of Fig. 4, but with the plunger a little curtailed at itsrear end, and with its die face in active relation with the rule blank;Fig. 6, a plan showing the strip of sheet-metal or blank in three stepsof the process of forming a ring r circle rule, including thepreliminary first curve or are, the next lesser curve or are and thefinal full circle for a round printers rule; Fig. 7. a cross-section onthe vertical line a, a, of Fig. 5. but omitting the plunger and itsmale-die; 8, a plan of a modified form of base-member and adjustableworktable member for the variable adjustments of the plunger or activemale-dies, and showing the coinpensatiug-screw member; and.

Fig. 9. a fore-end view of Fig. 8.

In these views lindicates the work-table having the customary removablefemale-die holder-block 2, a series of screw-threaded holes 3 beingprovided for the mounting of the standardscrew 5 todifferentially-secure the block in the desired position to suit thecharacter and number of dies used for an operation of the press in theWork end of the said femaledie holder-block. Holes 2 are provided in thesaid holder-block 2 for accommodating the shank of the said screw 5.

Instead of using the said holder-block 2, when it desired to make circleor round rule 7, I provide a graduated removable and reducible nest ortelescopic-cluster of formerrings 6 that are concentrically-carried by acentral sleeve 41: on the shank of said screw 5, as best seen in Fig. 7,but also Well shown inplace for use in Fig. 4, to suit the diameter ofthe full-circle rule desired, or the radius of any desiredpartial-circle rule. In Fig. 4, I show a strip of sheet-metal orruleblank 7 in working position in the gap 8, between the male-die 9 andthe face of the outermost anvil or former ring 6, ready for the advanceshaping-stroke of the said maledie that has removable dovetail-jointconnection 10 with the fore end of the plunger 01" ram 11, the latterbeing reciprocable in a pair of transversely-positioned guidewayblocks11"- 11, that are suitably secured on the top of the worktable 1. Themetal strip or blank 7 is ted forward across the gap 8 in the path ofthe male-die 9 and formed into successive arcs 6), the outermost aretaking the contour ot the outermost anvil or former ring 6 and thesucceeding arcs being produced by removing successive former-rings fromthe nest until. the round or full-circle rule of the desired diameter iscompleted on the corre ionding inner former-ring 6, or the otherwisedesired one of the set 01 former-rings ot the nest or set, to suit thediameter of round or tull-circle rule required. hen the selected one ofthe formenrings has been reached, with the outer ones of the set easilyremoved and set aside, the opposite ends of the metal strip or blankapproach each other and abut in closed position ready for the use of theprinter.

In operating the press, the hand-lever 19 is raised and (lepresscdinterniittiugly, its full depressed stroke being shown in Fig' :2, andfully stopped or limited by contact with the edge of the handnvheel 12ot a longitudinal compensating-screw 1?,- that is user to adjustthe'block 14-. "forward when the work-gap 8 between the dies has beenwidened at the time of removing each successive former-ring from thenest- 6, the extent of the stroke of the plunger 11 being adapted toeach successive operating-step ot the circle-forming process whereby theinner end and the succeeding inclusive portion of the hand-ted blank 7*advances in a circular path while in its contact with the anvil 'face otthe adjacent former-ring, the latter being tree to simultaneously and.coincidentally rotate therewith, all while the circle-rule underformation is in the active course of its production.

The hand-lever 19 is pivotally1nounted in an upright bearing box 19 onthe said adjustable carrier-block 14rand has a togglelink connection 19with the tail end or" the plunger 11 for reciprocating the latter in theguideways 11, 11, along the top surface of the work-table 1. The foreend of the screw 13 engages a screw-threaded opening in the rigidsupporting-block 16 of the worl-:table, but the rear end of the saidscrew 13 is smooth-faced for free rotaryengagement, but notlongitudinally so with the smooth bore of a central opening in theblockld, a collar 12 being securely mounted on the tore part of saidsmooth portion of the screw, be veen the said block 14: and the reartaco of the transverse table-supporting block 16, as best seen in Fig. 8to prevent the longitndinal-i'noven'ient ot the Said smooth rear end ofthe screw 13 in the said carrier-block 14. A pair of parallel dulyspaced longitudinal rods 17 and 17 is provider and projects forwardlyfrom the inner vertical taco of the said adjustable block 14:, pins 18being used to secure their inner ends 18 in holes made in said block14-. These rods 17 and 17 register with and freely engage holes in thetransverse table-supporting blocks 15 and 16 for the reciprocaladjustments movement of the said block 1%, in the use of thecoinpensitting-screw 13.

A. inodilicd form of plunger base-member 1 is shown in Figs. 8 and 9, inwhich the mechanical screwv-actimi is the same as that in Fig, 3, but itdiscards the pa 'allel registering rods '17 and 17 and substitutesthereid no-bed 20 that is adapted to carry the superposed plunger-diecomponent members into operative sheet-metal printers ruleshaping-position.

In a hand-press for producing circular rule and the like, thecombination of a basemember, and a. justably-mounted block on saidbase-n'ieinber, a stationary work-table mounted on said base-member, aremovable nest: of coi'icent-ric former or anvil circle-dies on thework-table, a longitudinal Screwmember projecting 'lornardly from thesaid block into threaded engagement with said work-table and adapted topropel the said block into compensated position along said baseanembcrin relation to said worl-z-table and nest of circle-die formers. aplunger or rain reciprocally movable on the work-table, a shaper orformer die mounted at the fore end of the plunger, and a toggle-jointedhand-lever pivotallv connected to the rear end ot' the said plungersubstantially as shown and described.

IL/LIAM PA KE.

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